报错：command not found

[doubleJJJJ]

/Users/xxxx/Downloads/libstdc--master/install-xcode_11+.sh: command not found

[LT13S]

自动脚本运行不成功就手动复制到相应的目录去吧，其实就是把libstdc-下的1的文件夹复制到Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/
把2的文件夹复制到/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib/
把3的文件夹复制到/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib/
把4的文件夹复制到/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib/